Adding Factorial Program

Adding a basic program to find the factorial of a given number.

Author: starmayank07

Basic-Programs/factorial.java

@@ -0,0 +1,24 @@
+import java.util.Scanner;
+
+class Factorial
+{
+  public static void main(String args[])
+  {
+    int n, c, f = 1;
+
+    System.out.println("Enter an integer to calculate its factorial");
+    Scanner in = new Scanner(System.in);
+
+    n = in.nextInt();
+
+    if (n < 0)
+      System.out.println("Number should be non-negative.");
+    else
+    {
+      for (c = 1; c <= n; c++)
+        f = f*c;
+
+      System.out.println("Factorial of "+n+" is = "+f);
+    }
+  }
+}